'use client';
import { useCallback, useState } from 'react';
import { useContext } from 'use-context-selector';
import { useTranslation } from 'react-i18next';
import useSWR from 'swr';
import { useSearchParams } from 'react-router-dom';
import { Link } from 'react-router-dom';
import { CheckCircleIcon } from '@heroicons/react/24/solid';
import style from './style.module.css';
import cn from '@/utils/classnames';
import Button from '@/app/components/base/button';

import { SimpleSelect } from '@/app/components/base/select';
import { timezones } from '@/utils/timezone';
import { LanguagesSupported, languages } from '@/i18n/language';
import { activateMember, invitationCheck } from '@/service/common';
import Toast from '@/app/components/base/toast';
import Loading from '@/app/components/base/loading';
import I18n from '@/context/i18n';
const validPassword = /^(?=.*[a-zA-Z])(?=.*\d).{8,}$/;

const ActivateForm = () => {
  const { t } = useTranslation();
  const { locale, setLocaleOnClient } = useContext(I18n);
  const [searchParams] = useSearchParams();
  const workspaceID = searchParams.get('workspace_id');
  const email = searchParams.get('email');
  const token = searchParams.get('token');

  const checkParams = {
    url: '/activate/check',
    params: {
      ...(workspaceID && { workspace_id: workspaceID }),
      ...(email && { email }),
      token,
    },
  };
  const { data: checkRes, mutate: recheck } = useSWR(checkParams, invitationCheck, {
    revalidateOnFocus: false,
  });

  const [name, setName] = useState('');
  const [password, setPassword] = useState('');
  const [timezone, setTimezone] = useState(Intl.DateTimeFormat().resolvedOptions().timeZone);
  const [language, setLanguage] = useState(locale);
  const [showSuccess, setShowSuccess] = useState(false);

  const showErrorMessage = useCallback((message: string) => {
    Toast.notify({
      type: 'error',
      message,
    });
  }, []);

  const valid = useCallback(() => {
    if (!name.trim()) {
      showErrorMessage(t('login.error.nameEmpty'));
      return false;
    }
    if (!password.trim()) {
      showErrorMessage(t('login.error.passwordEmpty'));
      return false;
    }
    if (!validPassword.test(password)) {
      showErrorMessage(t('login.error.passwordInvalid'));
      return false;
    }

    return true;
  }, [name, password, showErrorMessage, t]);

  const handleActivate = useCallback(async () => {
    if (!valid()) return;
    try {
      await activateMember({
        url: '/activate',
        body: {
          workspace_id: workspaceID,
          email,
          token,
          name,
          password,
          interface_language: language,
          timezone,
        },
      });
      setLocaleOnClient(language, false);
      setShowSuccess(true);
    } catch {
      recheck();
    }
  }, [email, language, name, password, recheck, setLocaleOnClient, timezone, token, valid, workspaceID]);

  return (
    <div className={cn('flex flex-col items-center w-full grow justify-center', 'px-6', 'md:px-[108px]')}>
      {!checkRes && <Loading />}
      {checkRes && !checkRes.is_valid && (
        <div className="flex flex-col md:w-[400px]">
          <div className="w-full mx-auto">
            <div className="mb-3 flex justify-center items-center w-20 h-20 p-5 rounded-[20px] border border-gray-100 shadow-lg text-[40px] font-bold">
              🤷‍♂️
            </div>
            <h2 className="text-[32px] font-bold text-gray-900">{t('login.invalid')}</h2>
          </div>
          <div className="w-full mx-auto mt-6">
            <Button variant="primary" className="w-full !text-sm">
              <a href="https://dify.ai">{t('login.explore')}</a>
            </Button>
          </div>
        </div>
      )}
      {checkRes && checkRes.is_valid && !showSuccess && (
        <div className="flex flex-col md:w-[400px]">
          <div className="w-full mx-auto">
            <div
              className={`mb-3 flex justify-center items-center w-20 h-20 p-5 rounded-[20px] border border-gray-100 shadow-lg text-[40px] font-bold ${style.logo}`}
            ></div>
            <h2 className="text-[32px] font-bold text-gray-900">{`${t('login.join')} ${checkRes.workspace_name}`}</h2>
            <p className="mt-1 text-sm text-gray-600 ">
              {`${t('login.joinTipStart')} ${checkRes.workspace_name} ${t('login.joinTipEnd')}`}
            </p>
          </div>

          <div className="w-full mx-auto mt-6">
            <div className="bg-white">
              {/* username */}
              <div className="mb-5">
                <label htmlFor="name" className="my-2 flex items-center justify-between text-sm font-medium text-gray-900">
                  {t('login.name')}
                </label>
                <div className="mt-1 relative rounded-md shadow-sm">
                  <input
                    id="name"
                    type="text"
                    value={name}
                    onChange={(e) => setName(e.target.value)}
                    placeholder={t('login.namePlaceholder') || ''}
                    className={
                      'appearance-none block w-full rounded-lg pl-[14px] px-3 py-2 border border-gray-200 hover:border-gray-300 hover:shadow-sm focus:outline-none focus:ring-primary-500 focus:border-primary-500 placeholder-gray-400 caret-primary-600 sm:text-sm pr-10'
                    }
                  />
                </div>
              </div>
              {/* password */}
              <div className="mb-5">
                <label htmlFor="password" className="my-2 flex items-center justify-between text-sm font-medium text-gray-900">
                  {t('login.password')}
                </label>
                <div className="mt-1 relative rounded-md shadow-sm">
                  <input
                    id="password"
                    type="password"
                    value={password}
                    onChange={(e) => setPassword(e.target.value)}
                    placeholder={t('login.passwordPlaceholder') || ''}
                    className={
                      'appearance-none block w-full rounded-lg pl-[14px] px-3 py-2 border border-gray-200 hover:border-gray-300 hover:shadow-sm focus:outline-none focus:ring-primary-500 focus:border-primary-500 placeholder-gray-400 caret-primary-600 sm:text-sm pr-10'
                    }
                  />
                </div>
                <div className="mt-1 text-xs text-gray-500">{t('login.error.passwordInvalid')}</div>
              </div>
              {/* language */}
              <div className="mb-5">
                <label htmlFor="name" className="my-2 flex items-center justify-between text-sm font-medium text-gray-900">
                  {t('login.interfaceLanguage')}
                </label>
                <div className="relative mt-1 rounded-md shadow-sm">
                  <SimpleSelect
                    defaultValue={LanguagesSupported[0]}
                    items={languages.filter((item) => item.supported)}
                    onSelect={(item) => {
                      setLanguage(item.value as string);
                    }}
                  />
                </div>
              </div>
              {/* timezone */}
              <div className="mb-4">
                <label htmlFor="timezone" className="block text-sm font-medium text-gray-700">
                  {t('login.timezone')}
                </label>
                <div className="relative mt-1 rounded-md shadow-sm">
                  <SimpleSelect
                    defaultValue={timezone}
                    items={timezones}
                    onSelect={(item) => {
                      setTimezone(item.value as string);
                    }}
                  />
                </div>
              </div>
              <div>
                <Button variant="primary" className="w-full !text-sm" onClick={handleActivate}>
                  {`${t('login.join')} ${checkRes.workspace_name}`}
                </Button>
              </div>
              <div className="block w-hull mt-2 text-xs text-gray-600">
                {t('login.license.tip')}
                &nbsp;
                <Link
                  className="text-primary-600"
                  target="_blank"
                  rel="noopener noreferrer"
                  to={`https://docs.dify.ai/${language !== LanguagesSupported[1] ? 'user-agreement' : `v/${locale.toLowerCase()}/policies`}/open-source`}
                >
                  {t('login.license.link')}
                </Link>
              </div>
            </div>
          </div>
        </div>
      )}
      {checkRes && checkRes.is_valid && showSuccess && (
        <div className="flex flex-col md:w-[400px]">
          <div className="w-full mx-auto">
            <div className="mb-3 flex justify-center items-center w-20 h-20 p-5 rounded-[20px] border border-gray-100 shadow-lg text-[40px] font-bold">
              <CheckCircleIcon className="w-10 h-10 text-[#039855]" />
            </div>
            <h2 className="text-[32px] font-bold text-gray-900">
              {`${t('login.activatedTipStart')} ${checkRes.workspace_name} ${t('login.activatedTipEnd')}`}
            </h2>
          </div>
          <div className="w-full mx-auto mt-6">
            <Button variant="primary" className="w-full !text-sm">
              <a href="/signin">{t('login.activated')}</a>
            </Button>
          </div>
        </div>
      )}
    </div>
  );
};

export default ActivateForm;
